5- Pink Girl Diaper Baby Shower Favor Idea. The materials you’ll need are: pretty napkins (paper or cloth), small paper or plastic cups, cute safty pins, and treats to put in the favors such as candies, chocolates or even nuts. To make the favor, fold your napkin into a triangle and then fold one of the tips upward. Unite the other two corners of the triangle to form the ‘diaper’ and secure it all with the